Or use a TDR like the Tektronix 7S12.
RG400 (solid PTFE dielectrice IIRC) in my experience typically comes out at
about 8.6" per nS which is slightly at odds with the published propogation
speed of .69 which would suggest 8.28". The 5nS cables I made up not long
back are almost exactly 43" long.
RG58 has a published propogation velocity of .66 (8" per nS) but tends to
vary rather more in characteristics (electrical length versus measured
length).
Dave
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Jeffrey Okamitsu
Sent: 03 October 2008 19:02
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] AC Connector On HP 5061B
A better way to cut coax to the right delay lengths is to use a network
analyzer.